You collected 3.90. All you have to do is multiply your amount given, .05 by the number of cans, 78. (.05*78) That should equal to 3.90, your answer.
Calculate the circumference and then add the 1 cm overlap:
C = pi*(6.6 cm) + 1 cm = 21.7 cm.
Next, mult this C by the height, 8.8 cm: Total area is 21.7 cm times 8.8 cm,
or 191.3 cm^3 (answer)
